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Protest Walk Report Protest Walk ReportSOME ACOUSTIC EFFECTS OF WIND TURBINES.
A statement by
DAVID MICHAEL MANLEY
PhD BSc(Hons) MIEE MIOA F Inst P C.Dip AF FICDDS C.Eng
Chartered Acoustician, Physicist and Engineer
Member: UKNA COMMITTEEI am Dr. David Manley, Chartered Physicist, Acoustician and Engineer.
Much work has been done by me near windfarms to evaluate the acoustic effects. It is found that people living within five miles of a windfarm cluster can be affected and if they are sensitive to low frequencies, they may be disturbed.I am currently working in conjunction with Dr Amanda Harry a practicing physician in this subject and she has over fifty examples of people affected by LF windfarm noise.
What is happening is the high velocities of the large turbines wind foils cause aerodynamic noise modulated by the regular dynamic pulse when the wind foil passes the base of the turbine.It has been found that an extensive seismic signal passes through the earth and may well at night time affect peoples sleep. It is admitted by fellow acousticians that much more research in this subject is needed and that none has been done since 1996 by the DTI. At many inquiries windfarm promoters will not accept there is an acoustic problem.
We are getting much data from Europe as well to paint a more accurate picture and feel that no more windfarms giving an alternative to power stations should be built. I gave two talks as an invited 'Speaker' at the recent successful Saddleworth Conference. These talks were about the evidence of "hot lines" from clusters of turbines which will at times cause much higher LF signals than first thought.
DAVID M. MANLEY